Quote: Originally Posted by
jwaters 
Forgive my complete lack of electrical understanding, but isn't that what the fuse is supposed to protect against? If you exceed the apmerage, it blows? So, if I tap into a 7.5amp fuse, and the fuse doesn't blow w/ laptop drawing max power, should that be fine, or is it still unsafe somehow?
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It is not only about safety and ther fuse, but the "cleanliness" of the power.
But, as for safety, first that assumes you pull the power AFTER a fuse in the box. Some people find unused sockets and pull power from there. The other problem is that fuses are installed to protect the circuit after it. Fuses also fuse for 125 percent of the max power rating of the circuit. No matter how you slice it, you will be drawing more power through the entire circuit because of the laptop. Is it a lot more, not necessarily, but it is more. This is only compounded if one uses a "rea" carputer.
It is just not "good" practice. Like putting the toilet seat down after use. Will not doing it cause any issues, probably not, but the wife/gf might not like it and eventually, it could lead to problems, or a complete meltdown. I have seen worse ideasw, it's just not the "best"
Michael